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首页> 外文期刊>Energy Conversion & Management >Drying of mint leaves in a solar dryer and under open sun: Modelling, performance analyses
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Drying of mint leaves in a solar dryer and under open sun: Modelling, performance analyses

机译：在太阳能干燥机和阳光直射下干燥薄荷叶：建模，性能分析

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摘要

In this study was investigated the thin-layer drying characteristics in solar dryer with forced convection and under open sun with natural convection of mint leaves, and, performed energy analysis and exergy analysis of solar drying process of mint leaves. An indirect forced convection solar dryer consisting of a solar air collector and drying cabinet was used in the experiments. The drying data were fitted to ten the different mathematical models. Among the models, Wang and Singh model for the forced solar drying and the natural sun drying were found to best explain thin-layer drying behaviour of mint leaves. Using the first law of thermodynamics, the energy analysis throughout solar drying process was estimated. However, exergy analysis during solar drying process was determined by applying the second law of thermodynamics. Energy utilization ratio (EUR) values of drying cabinet varied in the ranges between 7.826 and 46.285%. The values of exergetic efficiency were found to be in the range of 34.760-87.717%. The values of improvement potential varied between 0 and 0.017 kJ s~(-1). Energy utilization ratio and improvement potential decreased with increasing drying time and ambient temperature while exergetic efficiency increased.
机译：本研究研究了强制干燥对流和阳光直射下薄荷叶自然对流的太阳能干燥机的薄层干燥特性，并进行了薄荷叶太阳能干燥过程的能量分析和火用分析。实验中使用了由太阳能集热器和干燥柜组成的间接强制对流太阳能干燥器。干燥数据适合十个不同的数学模型。在这些模型中，Wang和Singh模型用于强迫太阳干燥和自然太阳干燥被发现可以最好地解释薄荷叶的薄层干燥行为。使用热力学第一定律，估算了整个太阳能干燥过程中的能量分析。但是，通过应用热力学第二定律确定了太阳能干燥过程中的火用分析。干燥柜的能量利用率（EUR）值在7.826和46.285％之间变化。发现运动效率的值在34.760-87.717％的范围内。改善潜力的值在0到0.017 kJ s〜（-1）之间变化。能量利用率和改善潜力随着干燥时间和环境温度的增加而降低，而能效提高。

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